CVE-2026-73048: Siyuan-Note Siyuan

Medium severity, CVSS 5.8. EPSS: 0.3% chance of exploitation in the next 30 days.

SiYuan versions before v3.7.4 contain an information disclosure vulnerability in the getRefIDsByFileAnnotationID endpoint that returns block identifiers citing PDF annotations without publish-access filtering. Attackers can extract block identifiers from restricted documents by supplying annotation identifiers visible in published pages, revealing citation relationships across forbidden and password-protected tiers.

Affected products

• Siyuan-Note Siyuan: before 3.7.4 (fixed in 3.7.4)

Published 2026-08-14. Last modified 2026-08-26.